122-java-type-design SKILL.md skillA
122-java-type-design from jabrena/plinth is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jabrena/plinth/122-java-type-design@v0.19.0Pins v0.19.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jabrena/plinth
- Path
skills/122-java-type-design/SKILL.md- Versions recorded
- 6
- Latest version
- v0.19.0, committed Sep 26, 2026
- First version recorded
- Apr 26, 2026
- Size
- 3,917 bytes
- Repository stars
- 461
- License
- Apache-2.0
Use when you need to review, improve, or refactor Java code for type design quality — including establishing clear type hierarchies, applying consistent naming conventions, eliminating primitive obsession with domain-specific value objects, leveraging generic type parameters, creating type-safe wrappers, designing fluent interfaces, ensuring precision-appropriate numeric types (BigDecimal for financial calculations), and improving type contrast through interfaces and method signature alignment.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Type Design Thinking in Java Review and improve Java code using comprehensive type design principles that apply typography concepts to code structure and organization for maximum clarity and maintainability. **What is covered in this Skill?** - Clear type hierarchies: nested static classes, logical structure - Consistent naming conventions: domain-driven patterns, uniform interface/implementation naming - Strategic whitespace for readability - Type-safe wrappers: value objects replacing primitive obsession (EmailAddress, Money) - Generic type parameters: flexible reusable types, bounded parameters - Domain-specific fluent interfaces: builder pattern, method chaining - Type weights: conceptual importance — core domain vs supporting vs utility - Type contrast through interfaces: contract vs implementation separation - Aligned method signatures: consistent parameter and return types across related classes - Self-documenting code: clear descriptive names - BigDecimal for precision-sensitive calculations (financial/monetary operations) - Strategic type selection: Optional, Set vs List, interfaces over concrete types …
Read the whole file at its exact version.
How to install
mdr add jabrena/plinth/122-java-type-design@sha256:d41549722c1f4f32The line at the top of this page pins the label v0.19.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ipahgyvvyivjp7s5)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Apr 26, 2026 and Sep 26, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.19.0 latest | 2026-09-26 | 9569c35 | 3,917 B | A | view · diff |
| v0.18.0 | 2026-08-01 | 26b0e71 | 3,917 B | A | view · diff |
| v0.17.0 | 2026-07-10 | aaee915 | 3,917 B | A | view · diff |
| v0.16.0 | 2026-06-15 | b73c9d3 | 3,928 B | A | view · diff |
| v0.15.0 | 2026-05-29 | a800339 | 3,928 B | A | view · diff |
| v0.15.0-SNAPSHOT | 2026-04-26 | 819f349 | 3,937 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3917 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jabrena/plinth · 461 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ipahgyvvyivjp7s5 GET https://markdownregistry.com/api/v1/resolve?ref=jabrena/plinth/122-java-type-design GET https://markdownregistry.com/api/v1/blob/d41549722c1f4f3214a184fa925fdbd3f4d3215f074542768551f5031d189b13
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.